C. difficile infection requires documenting the presence of toxin in the stools, usually by testing for the gene that produces toxin B, using a method called PCR. It is very sensitive, so it should not be used to test solid stools since that is likely a carrier state.
Definition of vassal. 1  1 : a person under the protection of a feudal lord to whom he has vowed homage and fealty : a feudal tenant. 2  2 : one in a subservient or subordinate position.
: the system of political organization prevailing in Europe from the 9th to about the 15th centuries having as its basis the relation of lord to vassal with all land held in fee and as chief characteristics homage, the service of tenants under arms and in court, wardship, and forfeiture.